upsert_budget

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden. It only states 'Create or update', implying a write operation, but provides no details on side effects (e.g., overwriting existing budgets), return values, or required permissions. Behavioral traits are severely under-disclosed.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single concise sentence that immediately conveys the core purpose. It is front-loaded with the action and resource. However, it lacks any structure (e.g., sections) that could improve scannability for an AI agent.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no output schema, the description should at least hint at return format or behavior. It mentions 'budget entry for a category and month' but doesn't confirm that start_date should be the first day of the month or that category_id comes from get_categories. The presence of sibling tools like get_budgets for reading is not referenced. Completeness is low.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, yet the description adds no parameter information. It fails to explain what start_date, category_id, amount, or currency represent or their constraints (e.g., start_date should be first of month). The description adds zero value beyond the raw schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'Create or update' and the resource 'Lunch Money budget entry', and specifies the context 'for a category and month'. This distinguishes it from sibling tools like create_category or get_budgets, which involve different resources or actions.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives or when not to use it. For example, it doesn't clarify that the upsert replaces existing budgets for the same category and month, or that get_budgets should be used for reading. The description lacks any comparative context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.